Police in Medford, Massachusetts, are investigating a civilian's dash cam video posted to YouTube allegedly showing an off-duty officer threatening to "blow a hole through your f---ing head" after pulling a man over for driving down a one-way street.
The driver told the Boston Globe he accidentally drove down a one-way street in Medford.
He had recently bought the dash-cam after being involved in an accident.
Medford police say they'll be interviewing the officer, the driver, and potentially other witnesses.
The officer is currently on paid administrative leave.
WARNING: The following video contains graphic language.